| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] could be [vb pp] by | 123 |
|
| 2 | could be [adv] [vb pp] by | 95 |
|
| 3 | [Wh det] could be [adv] [vb pp] | 47 |
|
